My computer ____start, no matter how hard I try.–It might have crashed.

not be a great suggestion. But before ______ is put forward, we’ll make do with it.

Iwonder why he has been acting so strange these days. —Recentpressure at work may ______ his behavior.

Some students want to challenge themselves by helping those victims in Zhouqu______ the mud slidestook place [ ]

依次填入下列各横线处的成语，最恰当的一组是( )①消防工作必须立足于 ，从提高公众的防火意识做起。②即使现有的产品畅销,也要 ，抓紧技术储备与新产品开发。③如果我们不从小事做起, ，那些细小的苗头最终可能酿成大祸。